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    • 1. 发明授权
    • Clad mud nozzle
    • 包泥喷嘴
    • US4301877A
    • 1981-11-24
    • US128695
    • 1980-03-10
    • John D. Cloud
    • John D. Cloud
    • E21B10/18E21C13/01
    • E21B10/18
    • An earth boring drill bit has a drilling fluid nozzle with features that protect the nozzle retaining ring from erosion and avoid pressing cracks. The drill bit has a passage with at least one outlet and a nozzle located at the outlet for discharging fluid. The nozzle has a shell mounted in the outlet and retained by a retaining ring. An insert is bonded inside the shell. The insert is of tungsten carbide or ceramic for resisting erosion. The insert has an extended portion that extends below the rim of the outer member for protecting the retaining ring from flowing drilling fluid.
    • 钻孔钻头具有钻井液喷嘴,其特征在于保护喷嘴保持环免受侵蚀,并避免挤压裂纹。 钻头具有至少一个出口和位于出口处用于排出流体的喷嘴的通道。 喷嘴具有安装在出口中并由保持环保持的外壳。 外壳内部插入一个插入物。 插入物是碳化钨或陶瓷以抵抗侵蚀。 插入件具有在外部构件的边缘下方延伸的延伸部分,用于保护保持环不会流动钻井液体。
    • 6. 发明授权
    • Longitudinal axis roller drill bit with gage inserts protection
    • 纵向滚轮钻头带套头保护
    • US4203496A
    • 1980-05-20
    • US951978
    • 1978-10-16
    • William Baker, IIICharles R. Harris
    • William Baker, IIICharles R. Harris
    • E21B10/08E21B10/50E21B10/52E21B9/08E21C13/01
    • E21B10/083E21B10/50E21B10/52
    • A Zublin type rotary drill bit is disclosed having a main body rotating about a main axis. The bit body includes a journl pin extending downwardly therefrom, with the journal pin forming a second axis disposed at an angle with respect to the main axis. The journal pin has a cutter rotatively mounted thereon, with the cutter having a spherical outer surface which has a plurality of inner rows of tungsten carbide mounted thereon. The gage row of the cutter is also formed on the spherical outer surface and defines a plane intersecting the intersection of the main and second axes. The cutter gage row is formed by a plurality of inserts having synthetic diamond cutting surfaces, which are facing downwardly toward the apex of the cutter, in order to scrape the sides of the bore hole during the downwardly traveling portion of the gage insert travel cycle. The cutter also has a heel portion which is located adjacent the backside of the gage inserts for protecting the inserts during the upwardly traveling portion of the gage insert travel cycle.
    • 公开了一种苏布兰式旋转钻头,其主体围绕主轴线旋转。 钻头体包括从其向下延伸的螺纹销,轴颈销形成相对于主轴线成一定角度设置的第二轴线。 轴颈销具有可旋转地安装在其上的切割器,切割器具有球形外表面,其具有安装在其上的多个内排碳化钨。 切割器的规格行也形成在球形外表面上并且限定与主轴和第二轴相交的平面。 切割量规列由具有合成金刚石切割表面的多个插入件形成,该表面向下朝向切割器的顶点朝下,以便在量规插入件行进循环的向下行进部分期间刮擦钻孔的侧面。 刀具还具有邻近量规插入件的后侧的跟部,用于在量规插入件行进循环的向上行进部分期间保护插入件。
    • 9. 发明授权
    • Rotary percussion earth boring bit
    • 旋转打击乐地球钻头
    • US3918538A
    • 1975-11-11
    • US48483874
    • 1974-07-01
    • HUGHES TOOL CO
    • BENDER MARK LESLIE
    • E21B10/26E21B10/38E21B10/40E21B10/56E21C13/01
    • E21B10/26E21B10/38E21B10/40E21B10/56
    • Disclosed herein is a rotary-percussion earth boring bit that has an improved geometric configuration to extend cutting insert life and reduce cutting insert breakage. The bottom surface contains a flat transverse face with a bevelled edge. Two rows of circumferentially spaced cutting inserts protrude from the bevel. One of the rows is spaced inwardly from an outer row to define an inner row, which has inserts positioned between the circumferentially spaced inserts of the outer row. The longitudinal axes of these inserts are substantially perpendicular to the bevel and inclined outward at an acute angle to the axis of rotation of the bit. A generally longitudinally extending groove is formed between each two adjacent inserts of the outer row. This arrangement produces a symmetry that tends to minimize the number of reflective surfaces. This equalizes the stresses generated by the impact induced shock waves transmitted through the bit.
    • 这里公开了一种旋转冲击钻地钻,其具有改进的几何构型以延长切削刀片寿命并减少切削刀片断裂。 底面包含具有倾斜边缘的平坦横向面。 两排周向间隔开的切削刀片从斜面突出。 行中的一个与外排向内间隔开,以限定内排,该内排具有位于外排的周向隔开的插入件之间的插入件。 这些插入件的纵向轴线基本上垂直于斜面并且与钻头的旋转轴成锐角向外倾斜。 在外排的两个相邻的插入件之间形成大致纵向延伸的槽。 这种布置产生倾向于最小化反射表面的数量的对称性。 这样就可以平衡通过钻头传递的冲击波产生的应力。